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Hairlines - the thinnest of the strokes in a typeface.

Half up - artwork one and a half times the size which it will be reproduced.

Halftone - an illustration reproduced by breaking down the original tone into a pattern of dots of varying size. Light areas have small dots and darker areas or shadows have larger dots.

Halftone screen - a glass plate or film placed between the original photograph and the film to be exposed. The screen carries a network of parallel lines. The number of lines to the inch controls the coarseness of the final dot formation. The screen used depends on the printing process and the paper to be used, the higher the quality the more lines can be used.

Hanging punctuation - punctuation that is allowed to fall outside the margins instead of staying within the measure of the text.

Hard copy - The output of a computer printer, or typed text sent for typesetting.

Hard disk - a rigid disk sealed inside an airtight transport mechanism. Information stored may be accessed more rapidly than on floppy disks and far greater amounts of data may be stored. Often referred to as Winchester disks.

Hardback - a case bound book with a separate stiff board cover.

Head - the margin at the top of a page.

Helvetica - a sans serif typeface.

Hickies - a dust particle sticking to the printing plate or blanket, which appears on the printed sheet as a dark spot, surrounded by a halo.

High-bulk paper - A paper made thicker than its standard basis weight.

Highlight - the lightest area in a photograph or illustration.

High contract - in photography, a reproduction with high gamma in which the difference in darkness (density) between neighboring areas is greater than the original.

Highlight - the lightest or whitest parts of a photograph represented by a halftone reproduction by the smallest dots or a complete absence of dots.

House style - The style of preferred spelling, punctuation, hyphenation and indentation used in a publishing house or by a particular publication to ensure consistent typesetting.

Hue - in color, the main attribute of a color, which distinguishes it from other colors.